Crondor's Marvellous Sequestration (abbreviated as CMS2) is a zeroth order miscellaneous spell which creates an arcane connection between a sapphire ring and a staff, allowing the caster to store the staff between the folds of reality.
When the staff is stored using the command 'store staff between here and there', it will seemingly not exist until it is called back into the caster's inventory with the command 'retrieve staff from elsewhere'. Only one staff can be stored in a star sapphire ring, and the ring can only be used by the caster.

 

Failed casts can do upwards of 1500 hit points of damage.
Failed attempts at retrieval can do anything from minor damage to losing an arm.